A). Yes. When you convert to a larger unit, you need less of them to hold the same volume, so the number decreases. (You have less gallons of gas in the tank than cups of gas.)
B). No, for the same reason.
C). D). No,no ! Both are absurd. The volume doesn't know or care what unit you're using to describe it, and certainly doesn't depend on the unit you use. (Changing the number of kilometers to Grandma's house to miles doesn't change the distance.)
E). Yes. As I've been trying to say all along, the actual volume doesn't change.
